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Navigation & Reading the Stars
7 min read
A phone is a fine map until it's cold, cracked, or dead. Carry a paper map and a compass, know the basics, and you'll always be able to find your way — even find north with nothing but the sky.
Map and compass fundamentals
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Orient the map: turn it until its features line up with the land and north on the map points north.
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Take a bearing by pointing the compass's direction-of-travel arrow at your goal and turning the dial until the needle sits in its outline ('red in the shed'). Walk that heading.
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Account for declination — the gap between magnetic north and true north — which varies by location. Your map's margin lists it.
Techniques that keep you found
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Handrails: follow a long feature like a river, ridge, or trail that runs your direction.
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Catching features: pick something you can't miss (a road, a lake) beyond your target, so you know if you've gone too far.
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Aim off: deliberately aim to one side of a target on a stream, so when you hit the water you know which way to turn.
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Track your progress by pacing and time — count how long a known distance takes you.
Don't rely on the phone alone
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Batteries die fast in the cold; download offline maps, but back them up with paper.
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Carry the phone warm and in a waterproof case, and a small backup battery.
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A compass never runs out of charge — learn it.
Find north by the stars (Northern Hemisphere)
Polaris, the North Star, sits almost exactly over true north and barely moves all night.
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Find the Big Dipper. The two stars at the end of its 'cup' (the pointer stars) point straight at Polaris.
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Follow that line about five times the gap between the pointers to reach a medium-bright star — that's Polaris.
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When the Dipper is low or hidden, the W-shaped constellation Cassiopeia sits on the opposite side of Polaris and points back to it.
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Face Polaris and you're facing north.
Find north by the sun
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The sun rises in the east and sets in the west — that alone orients you roughly at dawn and dusk.
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Shadow-stick method: put a stick upright, mark the shadow tip, wait 15–20 minutes, mark it again. The line from the first mark to the second points roughly east.
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At local solar noon in the Northern Hemisphere, the sun is due south and shadows point north.
Southern Hemisphere
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There's no bright southern pole star. Use the Southern Cross: extend its long axis about four-and-a-half times its length to an empty point in the sky — that point is roughly due south. Drop straight down to the horizon to find south.